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In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）

A、The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application

B、The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

C、To calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0

D、The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

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更多“In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）”相关的问题
第1题
[单选题] You are the administrator of the Coho Vineyard network. The network consists of 10 Windows 2000Advanced Server computers and 250 Windows 2000 Professional computers.Your company has two domains cohovineyard.com and westcoastsales.com.The company’s intranet site is on a Windows 2000 Advanced Server computer named Server A. ServerA is in the cohovineyard.com domain and is running Internet Information Services and Microsoft Proxy Server2.0 You want to configure the Windows 2000 Professional computers in the westcoastsales.com domain to ccess&#8194

A、Add cohovineyard.com to the domain suffix search order on the computers.  B、Add westcoassales.com to the domain suffix search orders on the computers.  C、Add westcoassales.com to the exceptions list in the Proxy server settings on the computers.   D、Configure the Proxy server settings on the computers to bypass the proxy server for intranet addresses.  

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第2题
[单选题] Your computer has Windows 2000 Professional installed. Your office has a power outrage while you were running the disk defragmenter utility on your computer. When you start the computer again， you receive the following message： "Bad or missing OS". What should you do？（）

A、Start the computer in safe mode and reformat the hard disk.  B、Start the computer in the debug mode and reformat the hard disk.  C、Start the computer using the ERD and repair the Master Boot Record.  D、Start the computer by using the Windows 2000 Professional CD-Rom. Then use recovery console to repair the Master Boot Record.  

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第3题
[单选题] You install a new AGP video adapter in your Windows 2000 Professional computer. You install the manufacturer’s device drivers provided with the adapter and reboot your computer to load these drivers. During the startup process， the monitor goes blank and your computer stops responding after that and even does not boot properly. What should you do to solve this problem？ （）

A、Start the computer by using Windows 2000 professional CD and then use Emergency Repair Disk. Restore the original adapter driver settings  B、Start the computer in the debug mode. Restore the original adapter driver settings  C、Start the computer in Safe mode. Rename the AGP device by using device manager  D、Start the computer by using the recovery console. Rename the AGP driver.   

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第4题
[单选题] When installing a new Plug and Play sound card， a technician should turn off and unplug the computer； remove the computer’s cover； locate the sound card slot， insert and secure the card in the slot and：（）

A、plug in and turn on the computer； let Windows recognize the new hardware and install the driver.  B、plug in the computer； let Windows recognize the new hardware and plug in the speakers.  C、let Windows recognize the new hardware； install the driver and plug in the speakers.  D、turn on and plug in the computer； let Windows recognize the new hardware and install the driver.  

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第5题
[] You have updated the modem driver on your Windows 2000 Professional computer. You restart your computer. Immediately after you log on, you receive a stop error. You need to start Windows 2000. What must you do? （）

A、A.Restart the computer in Safe Mode. Uninstall the modem driver.  B、B.Restart the computer by using the last known good configuration.  C、C.Restart the computer in Recovery Console. Replace the new Modem.inf file with the old modem.inf file.  D、D.Start the computer from the Windows 2000 startup floppy disks. Repair the registry.  E、E.Start the computer from the Windows 2000 startup floppy disks. Repair the system files.  

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第6题
[] You configure a new SQL Server 2005 computer to use TCP/IP with all default settings. Your corporate policy requires that each server use a firewall. You find that you can connect to the SQL Server instance from the local computer. However, client computers cannot connect to the SQL Server instance. You need to identify the most likely cause of the connection issues. What should you do first?（）

A、A.Ensure that port 1433 is open in your firewall.   B、B.Ensure that port 443 is open in your firewall.   C、C.Ensure that client computers connect by using Shared Memory protocol.   D、D.Ensure that the server is not paused.  

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第7题
[单选题] You are the administrator of your company’s network. You install Windows 2000 Professional on 10 computers in the graphics department. The 10 computers have built in USB controllers. You physically install a USB tablet pointing device on each computer. You install the 32-bit manufacturer tablets software on each computer. A tablet icon appears in the central panel to configure the device but the device does not work. You want the USB tablets to work on 10 computers. What should you do?（）

A、Enable the USB ports in the BIOS and reinstall the USB tablet device drivers.  B、Enable the USB root hub controller and reinstall the USB tablet device drivers.  C、Disable the USB error detection for the USB root hub controller and enable the USB tablet device in the hardware profile.  D、Reinstall the USB device drivers and disable the USB error detection.  

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第8题
[单选题] Your network consists of a single Active Directory domain. The network contains a server that runs Windows Server 2003 Service Pack 2 （SP2）. The server has an application that runs as a service. The application uses a domain service account to access other servers in the domain. Security policies require that users reset their passwords every 30 days. After the application runs for a month， the application fails.You need to ensure that the application starts and can access the remote servers. What&#

A、In the Services snap-in, set the service to log on as the Local System account and start the service.  B、In the Services snap-in, set the service to log on as the Local Administrator account and start the service.  C、In Active Directory Users and Computers, reset the server’s computer account. In the Services snap-in, start the service.  D、In Active Directory Users and Computers, set the Account Expires option to Never. In the Services snap-in, start the service.   

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第9题
[单选题] You work as an administrator at ABC.com. The ABC.com network consists of a single domain named ABC.com.ABC.com has a Windows Server 2012 R2domain controller， named ABC-DC01， which has the Domain Naming master and the Schema master roles installed. ABC.com also has a Windows Server 2008 R2 domain controller， named ABC-DC02， which has the PDC Emulator， RID master， and Infrastructure master roles installed.You have deployed a new Windows Server 2012 R2 server， which belongs to a workgroup， in ABC.com’s perimeter network.&#8

A、It sets up a computer account in a domain and requests an offline domain join when a computer restarts.  B、It sets up a user account in a domain and requests an online domain join when a computer restarts.  C、It sets up a computer account in a domain and requests an offline domain join immediately.  D、It sets up a computer account in a domain and requests an online domain join immediately.  

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第10题
[] Your network contains an Active Directory domain named contoso.com. The domain contains 20 computer accounts in an organizational unit （OU） named OU1. A user account named User1 is in an OU named OU2.You are configuring a Group Policy object （GPO） named GPO1. You need to assign User1 the Backup files and directories user right to all of the computer accounts in OU1.Which two actions should you perform？（）

A、A.Link GPO1 to OU1  B、B.Link GPO1 to OU2.  C、C.Modify the Delegation settings of GPO1.  D、D.From User Configuration in GPO1， modify the security settings.  E、E.From Computer Configuration in GPO1， modify the security settings  

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